XJ-S Convertible (XJ27) L6-4.0L (1996)
Radiator Cooling Fan Temperature Sensor / Switch: Service and Repair
THERMOSTATIC SWITCH
CAUTION: Do not remove the pressure cap at the remote header tank unless the engine is cold.
Fig. 1
Open the bonnet and fit wing protection.
Release and remove the pressure cap.
Raise and support the front of the vehicle.
Place a drain tin in position below the radiator bottom hose.
Slacken the hose securing clip and withdraw the hose from the radiator.
Allow the coolant to drain into the tin.
Reposition and secure the bottom hose to the radiator.
Lower the vehicle.
Remove the air cleaner assembly for access to the thermostatic switch (Fig. 1).
Cut the ratchet strap securing the switch multi-plug and disconnect the plug.
Undo and remove the switch.
Fit and tighten the replacement switch with a new washer interposed.
Reconnect the harness multi-plug and secure with a ratchet strap.
Refit the air cleaner assembly.
Top up the cooling system with the correct concentration of coolant solution.
Refit the pressure cap.
Run the engine until correct operating temperature is reached, i.e. the thermostat is open, set the heater controls to 85 and Defrost, check for leaks and
stop the engine.
Carefully remove the pressure cap and check / top up the coolant.
Refit the pressure cap.
Remove wing protection and close the bonnet.
TORQUE FIGURES
Thermostatic switch to radiator 8.5-11.5 Nm